Introducing the TinyS3[D] - The Tiny Mighty ESP32-S3 development board in the TinyPICO format!

TinyS3[D] includes an onboard antenna and a u.FL connector for an external antenna on the same board, and you can switch which antenna to use via the RF switch on the fly from inside your code!

Two antenna options - one board!

The onboard antenna is selected by default, so you never need to worry about the RF switch being in a bad state, or the ESP32-S3 getting damaged if you forget to plug in an external antenna.

TinyS3 is the latest in Unexpected Maker's super popular range of "Tiny" development boards. It's packed with amazing features and peripherals, wireless connectivity, and stacks of Flash and PSRAM, all in the same tiny package size as the original TinyPICO!

The TinyS3 ships with the latest version of CircuitPython with ESP32-S3 support. It also ships with the UF2 bootloader, so you can easily update your TinyS3 with the latest CircuitPython firmware, whenever you desire. Just plug your TinyS3 into your computer, and it will appear in your filesystem as a USB flash drive! Just copy your code over, or edit your code directly on the drive. Coding a microcontroller has never been easier!

As newer versions of CircuitPython are released, you can update as you need from circuitpython.org If you need to grab the shipping CircuitPython code that comes with the TinyS3, you can grab the latest here

You can also use Arduino 2.0.3 or later, which has added S3 support. There is also ESP-IDF and an early MicroPython port available. Visit the TinyS3 product page for more details.

Features & Specifications

• Dual 32bit Xtensa LX7 cores @ up to 240Mhz
• RISC-V Ultra Low Power Co-processor
• 2.4GHz Wifi - 802.11b/g/n
• Bluetooth® LE 5 + Mesh
• 8MB QSPI Flash
• 8MB of extra QSPI PSRAM
• 700mA 3.3V LDO Regulator
• Low power RGB LED
• ULTRA LOW Deep Sleep Current
• USB-C Connector with back-feed protection
• Native USB + USB Serial JTAG
• LiPo Battery Charging
• Pads on the back for JST PH connector
• 17 GPIO
• 5V Sense Pins
• NEW I2C Battery Fuel Gauge
• NEW 3D High Gain Antenna AND u.FL connector
• Compatible with TinyPICO & TinyS2

Play video: New Products 8/21/25 Feat. Adafruit BMP581 I2C / SPI Temp Humidity Pressure Sensor - STEMMA QT